DEE ZEE DZ11984 Brite-Tread Bed Caps. Bed side rail protector. Covers inside and top of rail with stake holes. Material is aluminum. Direct fit compatible with 2007-2013 Chevrolet Silverado 1500/ 2007-2014 Chevrolet Silverado 2500 HD/ 2011-2014 Chevrolet Silverado 3500 HD.